EP2936684B1 - Appareil domestique présentant un panneau de commande capacitif et procédé pour sa fabrication - Google Patents

Appareil domestique présentant un panneau de commande capacitif et procédé pour sa fabrication Download PDF

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Publication number
EP2936684B1
EP2936684B1 EP13811470.7A EP13811470A EP2936684B1 EP 2936684 B1 EP2936684 B1 EP 2936684B1 EP 13811470 A EP13811470 A EP 13811470A EP 2936684 B1 EP2936684 B1 EP 2936684B1
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EP
European Patent Office
Prior art keywords
touch
film
domestic appliance
sensitive film
appliance according
Prior art date
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EP13811470.7A
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German (de)
English (en)
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EP2936684A1 (fr
Inventor
Abdul Aziz
Erich Schmid
Thomas SPITZNER
Peter Vogelsang
Carsten ZEI
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication date
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Publication of EP2936684A1 publication Critical patent/EP2936684A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/086—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination touch control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960755—Constructional details of capacitive touch and proximity switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960785—Capacitive touch switches with illumination
    • H03K2217/96079—Capacitive touch switches with illumination using a single or more light guides

Definitions

  • the invention relates to a household appliance with a capacitive control panel and a method for its production. More particularly, the invention relates to a household appliance with a control device, an at least partially translucent panel and an at least partially translucent control panel with at least one capacitive sensor for selecting a program function of the household appliance by a user of the device and a method for producing this household appliance.
  • Domestic appliances generally have a control panel that provides the ability to set up programs to be executed in the home appliance, and a display of information about the performance of a selected program.
  • Household appliances are in this case, for example, laundry treatment equipment such as washing machines, dryers and washer-dryers, dishwashers, microwave ovens, ovens and stoves, blenders, coffee machines, etc.
  • the presentation of information and selected programs is generally done via an optical display, often in the individual display sub-areas associated programs Lighting the display sections highlighted and thus in particular their implementation can be displayed.
  • the DE 10 2009 045 665 A1 describes an operating device for a household appliance with a touch-sensitive control surface, a display unit, and a spacer frame, by which the control surface and the display unit spaced from each other are, wherein the spacer frame is formed integrally with a housing part of a housing of the operating device.
  • the Chinese utility model CN00020117490Y describes a control device for a home appliance equipped with a touch-sensitive switch that includes a semi-transparent panel and a conductive film that converts touches into electrical signals within the semitransparent panel.
  • the EP 1 970 479 A2 describes a control panel for controlling an operation of a device, the control panel comprising: a semi-transparent cover; a film disposed behind the semi-transparent cover and printed with a plurality of characters or symbols; a detecting panel disposed behind the film and having a plurality of detecting members for detecting a capacity of a human body; a printed circuit board having a light-emitting unit that irradiates light onto the film to display the characters or symbols of the film on a back surface of the semi-transparent cover member; and a guide member having a plurality of optical paths that guide the light emitted from the light-emitting unit into each of the characters or symbols of the film.
  • the EP 2 385 630 A2 describes a capacitive touch switch comprising: a transparent insulating panel, a filtering layer having an opaque color, wherein a transparent icon is defined in the filtering layer; a transparent substrate that includes a capacitive electrode and is colored to be substantially matched to the opaque color of the filtering layer; and a light source configured to guide light through the transparent substrate, the transparent icon, and the transparent panel.
  • the DE 10 2010 063 280 A1 describes a control with capacitive sensor to activate, for example, when approaching a function display and / or backlighting, comprising: a button or push switch for a switching functionality, defining a control surface film layer structure, which is pressed by pressing the control surface of the button or pressure switch and the film layer construction comprises at least one film, for example a polycarbonate film, and a conductive layer applied to the film for providing at least one electrode of the capacitive sensor.
  • the DE 102 34 125 A1 describes an illuminable plastic injection molded part having a display function having a first visible surface area with a foil and a second surface area.
  • An electroluminescent film is connected to the plastic injection-molded part.
  • For the production of a plastic molding is first prepared by injecting the electroluminescent sheet with a metallizable thermoplastic material in an injection molding tool.
  • the DE 10 2009 033 538 A1 describes an operating device for an electrical appliance, wherein the operating device has a control panel, a light indicator and a touch switch together with a flat, pressure-sensitive sensor element, wherein the control panel has at least one opening which is closed by a translucent window, wherein at the back of the control panel a flatter Component carrier is arranged, which has light-emitting means on one side and at least the planar sensor element in the region or near the at least one opening on a rear side facing away from the control panel.
  • a light guide component is molded onto a component with plastic.
  • the DE 10 2007 006 506 A1 describes an actuating element for a function carrier in a motor vehicle, comprising a carrier element; a piezoelectric element applied to the support member; a translucent layer over the support member and the piezoelectric element switch; and a decorative layer arranged on the translucent layer, wherein the piezoelectric element is inclined relative to the decorative layer and by an external light source, preferably an LED, is illuminated.
  • the decorative layer is back-injected with a light guide layer.
  • the JP 2010 165618 A also describes the injection molding of a film with a light guide layer.
  • the US 2011/0012845 describes structures of touch sensors for displays. According to FIG. 13, the electrical connection between a printed circuit board and a sensor surface is produced by means of a Tails.
  • the display screen film and the touch-sensitive film each consist of a plastic film, these films being flexible plastic films of PET (polyethylene terephthalate), polyethylene, polypropylene, polyetheretherketone, polycarbonate, polyoxymethylene or ABS.
  • PET polyethylene terephthalate
  • polyethylene polyethylene
  • polypropylene polypropylene
  • polyetheretherketone polycarbonate
  • polyoxymethylene polyoxymethylene or ABS.
  • the display screen film and the touch-sensitive film each preferably have a thickness of 5 to 500 ⁇ m, more preferably 25 to 200 ⁇ m.
  • the at least one capacitive sensor and the electrical conductor tracks can be applied to the touch-sensitive film in a wide variety of ways.
  • the coating techniques for the touch-sensitive film as well as the display screen film are not particularly limited as long as sufficient adhesion is provided to the touch-sensitive sheet as well as to the display screen film, especially during the production of the plastic component comprising the components (a), (b) and (c ), is guaranteed.
  • the at least one capacitive sensor and the electrical interconnects are printed on the touch-sensitive film.
  • the printing techniques are not particularly limited. Preferably, however, screen printing is used. In a preferred embodiment, therefore, the printing is done by screen printing.
  • organic conductive structures on the films used according to the invention.
  • metal-containing conductive pastes are preferably used and printed.
  • Intrinsically conductive organic polymers are polymers that have a conjugated electron system and in particular exhibit a significantly higher electrical conductivity in the oxidized state than in the neutral state. Examples of these are polythiophene, polypyrrole, polyparaphenylene and polyvinylphenylene and their substituted derivatives. When using these materials, for example, polymeric organic electronic components such as diodes, transistors, capacitors or sensors can be produced in a simple and secure manner, but also integrated circuits. These materials have the advantage that they can be applied by printing on plastic films.
  • the material of the touch-sensitive sheet is not limited as long as sufficient light transmittance can be provided.
  • the touch-sensitive film is polyethylene terephthalate.
  • the signals of the capacitive sensors must be evaluated so that it can take place over this control of the household appliance.
  • the sensors are generally connected to a corresponding evaluation electronics. This is generally located on a circuit board adjacent to the control panel.
  • the touch-sensitive film is connected to a printed circuit board via a flat connection part, which is also referred to herein as a tail, that is to say via a flat tail which has conductor tracks and / or connection pads.
  • a flat connection part which is also referred to herein as a tail, that is to say via a flat tail which has conductor tracks and / or connection pads.
  • LEDs and / or the evaluation electronics for touching the touch-sensitive film are arranged on the circuit board.
  • the material of the display screen is not particularly limited, as long as applied to these symbols for the identification of processes or conditions in the household appliance can be.
  • a suitable coating also ensures that only the area provided for displaying information can be illuminated by a light source.
  • the coating can be applied in the form of lines, patterns, webs, symbols, signs and the like, e.g. as a screen printing lacquer, which is then dried.
  • the display screen is a diffusion sheet having recesses for symbols to be displayed. Since, for example, LEDs largely provide only punctual light, the foil ensures that this light is scattered and thus the illumination is uniform and easy to read.
  • the display screen film very particularly preferably consists of polycarbonate on which suitable lacquer layers or symbols which can be represented by means of lacquers can still be printed.
  • a display with various symbols is generally illuminated in the control panel.
  • the light of a suitable light source can be arranged behind or laterally to the control panel.
  • the control panel on the side facing away from the touch-sensitive film side of the structured light guide layer on at least one light source.
  • the illuminant is not limited according to the invention. Preferably, one or more LEDs are used.
  • Both inorganic light-emitting diodes and organic light-emitting diodes can be used.
  • the light-emitting diodes can be present as top LEDs or as side LEDs.
  • organic light-emitting diodes can be used in addition to the known inorganic light-emitting diode materials.
  • Organic light emitting diodes generally use small organic molecules (SM-OLEDs) or organic polymers (PLEDs).
  • SM-OLEDs include, for example, organometallic chelates and conjugated dendrimers.
  • PLEDs include electrically conductive polymers such as polythiophenes, polypyrroles, polyfluorenes and poly (p-phenylenevinylenes), which may optionally be suitably substituted.
  • Preferred substituents are alkyl and alkoxy groups.
  • PLEDs are the possibility of using them as flexible films obtained, for example, by electropolymerization of the corresponding monomers, spincoats or printing (screen printing) of the polymers, and in addition the power requirement for the PLEDs is relatively low.
  • control panel on the side facing away from the touch-sensitive film side of the structured light guide layer on at least one light emitting diode.
  • the number of lamps used can vary greatly according to the invention, which can be used with different colors luminous LEDs, for example, to display more information.
  • the household appliance according to the invention has a translucent panel.
  • the translucent panel preferably consists of glass, glass ceramic or a plastic, at least in a light-permeable area of the panel.
  • a laminate of the display display film and the touch-sensitive film obtained in step (i) is introduced into a mold of an injection molding machine, and then the back-molding with a viscous mass of the photoconductive plastic is performed.
  • the display screen film is generally coated by suitable coating with opaque substances, e.g. Paints, designed to have the symbols and translucent areas required for their use.
  • opaque substances e.g. Paints
  • structured layers can also be produced by treating an initially completely coated substrate with a suitable etching medium in accordance with a metallic conductive pattern to be achieved. Possibly.
  • a layer applied over the entire surface can also be structured by laser ablation.
  • the invention has several advantages. Thus, it is possible to easily represent an operator selection and implementation of a program to be carried out in the household appliance. Moreover, the invention enables an improved representation of information about program selection and execution, since an improved visual representation is possible. It may be a provision of information about the operation of a household appliance, which allow a user to adjust the operation of the household appliance, influence and monitor.
  • the invention enables the production of a household appliance with a simplified installation of a control panel.
  • the number of assembly steps is reduced.
  • the invention makes it possible that a tail for plugging no longer has to be guided through the circuit board and on a circuit board by the elimination of a feedthrough slot for the tail less space loss can occur.
  • a two-sided mounting of the printed circuit board caused by the arrangement of the plugs can be omitted.
  • This structure can also be realized in a so-called piggyback solution, in which the power unit (PU) is arranged behind an operating unit (OU), since, for example, the tail no longer has to be plugged into the back of the operating unit.
  • a control panel 2 with two capacitive sensors 3 and 3 ' is arranged, which can detect touches of a user of the household appliance, which evaluated and the control device of the Household appliance for initiating programs or program steps.
  • the operating panel 2 has a plastic component 4, which comprises a display screen film 5 made of polyethylene terephthalate (PET) and a touch-sensitive film 6, which has the two capacitive sensors 3 and 3 '.
  • the plastic component 4 was produced by laminating a self-adhesive display display sheet 5 with the touch-sensitive sheet 6. Subsequently, the laminate was introduced into the mold of an injection molding machine and applied with a viscous polycarbonate mass, a structured light guide layer 7. The patterning of the optical waveguide layer 7 was effected in such a way that the optical waveguide material, i. Polycarbonate, has been arranged so that light from light emitting diodes 12 can easily get into this.
  • the optical waveguide material i. Polycarbonate
  • the light-emitting diodes 12 are arranged in the embodiment shown here on a printed circuit board 9, on which there are also a plug 10 and an electronic evaluation unit 11 for the touch of the touch-sensitive film 6.
  • a tail 8 connects the touch-sensitive film 6 with the plug 10 on the circuit board.
  • Fig. 2 is designed as a substantially enlarged section Fig. 1 the multi-layer plastic component 4 shown in the control panel 2 closer.
  • the optical waveguide layer 7 is structured so that bulges in the direction of light-emitting diodes, not shown here, show.

Claims (13)

  1. Appareil électroménager avec un dispositif de commande, un écran (1) au moins partiellement transparent ainsi qu'avec un tableau de commande (2) au moins partiellement transparent avec au moins un détecteur capacitif (3, 3') pour la sélection d'une fonction du programme de l'appareil électroménager par un utilisateur de l'appareil, dans lequel le tableau de commande (2), qui est disposé derrière l'écran, comprend un composant (4) constitué de plusieurs couches, comprenant
    (a) un film indicateur d'affichage (5) ;
    (b) un film sensible au toucher (6), qui comprend ledit au moins un détecteur capacitif (3, 3') ainsi que des pistes conductrices de l'électricité ; et
    (c) une couche de guide de lumière (7) structurée,
    caractérisé en ce que le composant est un composant en matière plastique et en ce que la couche de guide de lumière structurée est en polycarbonate ou comprend du polycarbonate ;
    dans lequel le film indicateur d'affichage est autoadhésif ;
    dans lequel le film indicateur d'affichage (5) ainsi que le film sensible au toucher (6) sont des feuilles de matière plastique souples en PET (téréphtalate de polyéthylène), polyéthylène, polypropylène, polyétheréthercétone, polycarbonate, polyoxyméthylène ou ABS, et dans lequel le composant en matière plastique (4) est apte à être obtenu par liaison du film indicateur d'affichage (5) autoadhésif au film sensible au toucher (6) et à un surmoulage terminal de la couche de guide de lumière (7) structurée.
  2. Appareil électroménager selon la revendication 1, caractérisé en ce que ledit au moins un détecteur capacitif (3, 3') ainsi que les pistes conductrices de l'électricité sont imprimés sur le film sensible au toucher (6).
  3. Appareil électroménager selon la revendication 2, caractérisé en ce que l'impression se fait par sérigraphie.
  4. Appareil électroménager selon l'une des revendications 1 à 3, caractérisé en ce que ledit au moins un détecteur capacitif (3, 3') et/ou les pistes conductrices de l'électricité comprennent ou sont constitués d'un polymère organique intrinsèquement conducteur ou d'une matière conductrice métallique.
  5. Appareil électroménager selon l'une des revendications 1 à 4, caractérisé en ce que le tableau de commande (2) comprend, du côté opposé au film sensible au toucher (6) de la couche de guide de lumière (7) structurée, au moins une diode électroluminescente (12).
  6. Appareil électroménager selon l'une des revendications 1 à 5, caractérisé en ce que le film sensible au toucher (6) est constitué de téréphtalate de polyéthylène.
  7. Appareil électroménager selon l'une des revendications 1 à 6, caractérisé en ce que le film sensible au toucher (6) est relié à une plaque conductrice (9) par une bande (8) qui comprend des pistes conductrices et/ou des plages de connexion.
  8. Appareil électroménager selon la revendication 7, caractérisé en ce que sur la plaque conductrice (9) sont disposés des plots (10), des diodes électroluminescentes (12) et/ou l'électronique d'évaluation (11) des contacts sur le film sensible au toucher (6).
  9. Appareil électroménager selon l'une des revendications 1 à 8, caractérisé en ce que le film indicateur d'affichage (5) est une feuille de diffusion qui comprend des évidements pour des symboles d'affichage.
  10. Appareil électroménager selon la revendication 9, caractérisé en ce que le film indicateur d'affichage (5) est constitué de polycarbonate.
  11. Appareil électroménager selon l'une des revendications 1 à 10, caractérisé en ce que l'écran transparent (1) est constitué, au moins dans une zone transparente de l'écran (1), de verre, de vitrocéramique ou d'une matière plastique.
  12. Procédé de fabrication d'un appareil électroménager avec un dispositif de commande, un écran (1) au moins partiellement transparent, ainsi qu'avec un tableau de commande (2) au moins partiellement transparent avec au moins un détecteur capacitif (3, 3') pour la sélection d'une fonction du programme de l'appareil électroménager par un utilisateur de l'appareil, dans lequel le tableau de commande (2), qui est disposé derrière l'écran, comprend un composant (4) constitué de plusieurs couches, comprenant
    (a) un film indicateur d'affichage (5) ;
    (b) un film sensible au toucher (6), qui comprend ledit au moins un détecteur capacitif (3, 3') ainsi que des pistes conductrices de l'électricité ; et
    (c) une couche de guide de lumière (7) structurée ;
    caractérisé en ce que le composant est un composant en matière plastique et la couche de guide de lumière structurée est en polycarbonate ou comprend du polycarbonate, dans lequel le film indicateur d'affichage est autoadhésif et dans lequel le film indicateur d'affichage (5) ainsi que le film sensible au toucher (6) sont des feuilles de matière plastique souples en PET (téréphtalate de polyéthylène), polyéthylène, polypropylène, polyétheréthercétone, polycarbonate, polyoxyméthylène ou ABS, dans lequel le composant en matière plastique (4) est apte à être obtenu par la mise en oeuvre des étapes suivantes
    (i) liaison d'un film indicateur d'affichage (5) autoadhésif avec le film sensible au toucher (6) ; et
    (ii) surmoulage terminal du film sensible au toucher (6) avec une matière plastique conductrice de la lumière afin d'obtenir une couche de guide de lumière (7) structurée.
  13. Procédé selon la revendication 12, caractérisé en ce qu'un stratifié du film indicateur d'affichage (5) et du film sensible au toucher (6) obtenu dans l'étape (i) est introduit dans un moule d'une machine de moulage par injection et enfin le surmoulage est effectué avec une masse visqueuse de la matière plastique conductrice de la lumière.
EP13811470.7A 2012-12-19 2013-12-18 Appareil domestique présentant un panneau de commande capacitif et procédé pour sa fabrication Active EP2936684B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012223779.8A DE102012223779A1 (de) 2012-12-19 2012-12-19 Haushaltsgerät mit kapazitivem Bedienpanel und Verfahren zu seiner Herstellung
PCT/EP2013/077038 WO2014095964A1 (fr) 2012-12-19 2013-12-18 Appareil domestique présentant un panneau de commande capacitif et procédé pour sa fabrication

Publications (2)

Publication Number Publication Date
EP2936684A1 EP2936684A1 (fr) 2015-10-28
EP2936684B1 true EP2936684B1 (fr) 2017-03-29

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Application Number Title Priority Date Filing Date
EP13811470.7A Active EP2936684B1 (fr) 2012-12-19 2013-12-18 Appareil domestique présentant un panneau de commande capacitif et procédé pour sa fabrication

Country Status (4)

Country Link
EP (1) EP2936684B1 (fr)
DE (1) DE102012223779A1 (fr)
ES (1) ES2623052T3 (fr)
WO (1) WO2014095964A1 (fr)

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DE102009045665B4 (de) 2009-10-14 2018-10-11 BSH Hausgeräte GmbH Bedieneinrichtung für ein Haushaltsgerät sowie Haushaltsgerät mit einer derartigen Bedieneinrichtung
US9595960B2 (en) * 2010-05-04 2017-03-14 Whirlpool Corporation Dead-front user interface
DE102010063280A1 (de) * 2010-07-30 2012-02-02 Preh Gmbh Flächenintegrierte Tastatur mit kapazitiver Auswertung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL424133A1 (pl) * 2017-12-30 2019-07-01 Amica Spółka Akcyjna Interfejs sterowania
EP3703042A1 (fr) 2019-03-01 2020-09-02 BSH Hausgeräte GmbH Moyen d'affichage doté d'une film de dispersion
DE102019202831A1 (de) * 2019-03-01 2020-09-03 BSH Hausgeräte GmbH Anzeigemittel mit einer Streufolie

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DE102012223779A1 (de) 2014-06-26
EP2936684A1 (fr) 2015-10-28
WO2014095964A1 (fr) 2014-06-26
ES2623052T3 (es) 2017-07-10

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